EP3015870A1 - Messvorrichtung eines zerhackten stroms - Google Patents

Messvorrichtung eines zerhackten stroms Download PDF

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Publication number
EP3015870A1
EP3015870A1 EP15198460.6A EP15198460A EP3015870A1 EP 3015870 A1 EP3015870 A1 EP 3015870A1 EP 15198460 A EP15198460 A EP 15198460A EP 3015870 A1 EP3015870 A1 EP 3015870A1
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EP
European Patent Office
Prior art keywords
circuit
measuring
transistor
current
transformer
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Granted
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EP15198460.6A
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English (en)
French (fr)
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EP3015870B1 (de
Inventor
Pierre Sardat
Maxime MOREAU
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Valeo Systemes de Controle Moteur SAS
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Valeo Systemes de Controle Moteur SAS
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Publication of EP3015870A1 publication Critical patent/EP3015870A1/de
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
    • H02M3/33573—Full-bridge at primary side of an isolation transformer
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
    • G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
    • G01R15/183—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers using transformers with a magnetic core
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/0046—Arrangements for measuring currents or voltages or for indicating presence or sign thereof characterised by a specific application or detail not covered by any other subgroup of G01R19/00
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/18—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using conversion of DC into AC, e.g. with choppers
    • G01R19/20—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using conversion of DC into AC, e.g. with choppers using transductors, i.e. a magnetic core transducer the saturation of which is cyclically reversed by an AC source on the secondary side
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0003—Details of control, feedback or regulation circuits
    • H02M1/0009—Devices or circuits for detecting current in a converter

Definitions

  • the present invention relates to a device for measuring a chopped current.
  • Such a measuring device applies in particular to the measurement of a chopped current flowing at the input of a DC direct current converter.
  • Such a measuring device may comprise a pulse transformer.
  • the transformer comprises a primary circuit in which the chopped current flows, and a secondary circuit in which circulates an output current proportional to the chopped current.
  • the secondary circuit of the transformer comprises two output terminals between which is connected a measuring circuit of the output current.
  • the measuring circuit generally comprises a resistor.
  • the measuring device comprises for this purpose demagnetizing means of the transformer.
  • the demagnetization is effected by for example circulating the magnetizing current through a demagnetizing circuit so that the energy accumulated in the magnetising inductance can be released.
  • the current to be measured may also include positive, negative or zero instantaneous values.
  • the measuring circuit comprises a switch and means for synchronizing this switch with the chopped current, to allow the output current to flow in the measuring circuit when the chopped current is not zero ( positive or negative) and to prevent any flow of current in the measuring circuit when the chopped current is zero.
  • the switch allows the flow of the output current in both directions in the measuring circuit.
  • the demagnetizing circuit generally comprises a Zener diode connected in series with a diode arranged in the opposite direction of the Zener diode.
  • the demagnetization operation is performed during so-called freewheeling periods when the chopped current is zero.
  • the demagnetization phase is therefore dependent on the freewheeling period. However, this period depends on the duty cycle and may not be long enough to demagnetize the transformer.
  • the invention aims to at least partially overcome these disadvantages of the prior art, by proposing a device for measuring a chopped current, capable of measuring a bidirectional current, while ensuring a sufficient time to allow demagnetization.
  • the presence of a transformer in each branch of the H bridge allows to always have half a period of operation for the demagnetization of the transformer.
  • the degaussing time is known to become constant and no longer dependent on the duty cycle.
  • a unit configured to allow or prevent the flow of a current induced by the chopped current in a measuring circuit comprises a first switch and a second switch connected in reverse, the two switches being adapted to be controlled to allow circulation of a current induced by the chopped current, in the measuring circuit when the primary circuit of the associated transformer is closed and to prevent flow of current in the measuring circuit when the primary circuit of the associated transformer is open.
  • the first switch and the second switch are respectively made by a transistor, for example field effect.
  • the measurement circuits comprise at least one measurement resistor connected by a first terminal to ground.
  • the first measurement circuit comprises a first output resistor and the second measurement circuit comprises a second output resistor, such that the two output resistors are in series.
  • a measurement voltage can be measured at the common node between the two output resistors.
  • the demagnetizing means respectively comprise a demagnetization circuit connected between the two output terminals of the secondary circuit of the associated transformer.
  • a demagnetizing circuit comprises for example two Zener diodes connected in series and in the opposite direction.
  • the measuring device may have any of the previously described characteristics that are compatible with it.
  • the invention relates to a device 1 for measuring a chopped current, in particular flowing inside a direct current DC converter 3.
  • the converter 3 shown has an H-bridge structure having a first branch B 1 and a second branch B 2 .
  • the first branch B 1 comprises a first switch Mos 1 and a second Mos switch 2 .
  • the second branch B 2 comprises a first switch Mos 3 and a second switch Mos 4 .
  • the switches Mos 1 to Mos 4 comprise by way of non-limiting example a field effect transistor known by the acronym MOSFET, type N.
  • the first switch Mos 1 When the first branch B 1 is controlled, the first switch Mos 1 is on when the second switch Mos 2 is blocked, and conversely the second switch Mos 2 is on when the first switch Mos 1 is blocked.
  • the offset between the two branches B 1 and B 2 depends on the control logic of the H bridge.
  • the device 1 for measuring the chopped current comprises two transformers 10 B1 and 10 B2 transformation ratio m i .
  • the two transformers 10 B1 and 10 B2 are respectively arranged at a branch B 1 or B 2 of the converter 3.
  • a transformer B1 or B2 B2 comprises a primary circuit 12 and a secondary circuit 14.
  • the primary circuit 12 of a first transformer 10 B1 is connected to the first switch Mos 1 of the first branch B 1 of the converter 3.
  • the primary circuit 12 of the second transformer 10 B2 is connected to the first switch Mos 3 of the second branch B 2 of the converter 3.
  • the secondary circuit 14 of a transformer 10 B1 or 10 B2 has two output terminals 16 and 18.
  • a chopped current i e When a chopped current i e circulates in the converter 3, it divides at the two branches B 1 and B 2 , so that a first chopped current i Mos1 flows in the primary circuit 12 of the first transformer B1 , and a second chopped current i Mos3 flows in the primary circuit 12 of the second transformer B2 B2 .
  • a demagnetization of a transformer B1 or B2 B2 is performed when the primary circuit 12 of the first transformer B1 or the second transformer B2 B2 is open, the minced current i Mos1 or i Mos3 being zero, that is to say say when there is no current to measure.
  • the measuring device 1 makes it possible to measure the chopped current when the primary circuit 12 of the first transformer B1 or the second transformer B2 is closed, the chopped current Mos1 or Mos3 flowing in the primary circuit of the first transformer.
  • transformer 10 B1 or second transformer 10 B2 being non-zero.
  • the demagnetizing circuits 20 B1 , 20 B2 are distinct from the measuring circuits 22 B1 and 22 B2 .
  • Each demagnetizing circuit 20 B1 , B2 is connected between the two output terminals 16 and 18 of the associated transformer 10 B1 or 10 B2 .
  • Each demagnetizing circuit 20 B1 , 20 B2 demagnetizes the associated transformer 10 B1 or 10 B2 by circulating a current in the circuit. demagnetization 20 B1 or 20 B2 .
  • a demagnetizing circuit 20 B1 or 20 B2 comprises a first Zener diode 24 connected in series with a second Zener diode 26 between the output terminals 16 and 18.
  • the Zener voltage is as an illustrative example of the order of 10V .
  • the first Zener diode 24 and the second Zener diode 26 are mounted in opposite directions.
  • the first Zener diode 24 may be connected by its cathode to the output terminal 16 and the second Zener diode 26 may be connected by its cathode to the other output terminal 18.
  • the two Zener diodes 24 and 26 are then connected to each other by their anodes.
  • the demagnetizing circuits B1 , B2 are bi-directional, i.e., they allow demagnetization in both directions of magnetizing current flow, depending on whether the average value of the chopped current is positive or negative.
  • a first measuring circuit 22 B1 is connected to the output terminals 16, 18 of the secondary circuit 14 of the first transformer 10 B1 connected to the first branch B 1 of the converter 3.
  • the first measurement circuit 22 B1 is connected in parallel with the first circuit demagnetizing device 20 B1 .
  • a second measuring circuit 22 B2 is connected to the output terminals 16, 18 of the secondary circuit 14 of the second transformer 10 B2 connected to the second branch B 2 of the converter 3.
  • the second measuring circuit 22 B2 is connected in parallel with the second circuit degaussing 20 B2
  • the second measuring circuit 22 B2 is further connected to the first measuring circuit 22 B1.
  • the two measuring circuits 22 B1 and 22 B2 respectively comprise a unit configured to allow or prevent the circulation of a current induced by the chopped current in the measuring circuit 22 B1 or 22 B2 associated, and having a first switch and a second switch.
  • the unit of the first measuring circuit 22 B1 comprises a first switch K i1_HS and a second switch K i1_LS .
  • the unit of the second measuring circuit 22 B2 comprises a first switch K i2_HS and a second switch K i2_LS .
  • the first K i1_Hs and K i2_HS switches are also referred to as “high side” or “high side” switches.
  • the second switches K i1_LS and K i2_LS are also called low side switches or "Low Side” in English.
  • the first and the second switches K i1_HS and K i1_LS of the first measuring circuit 22 B1 and the first and second switches K i2_HS and K i2_Ls of the second measuring circuit 22 B2 are formed according to the example described by field effect transistors. , of the MOSFET type.
  • the first and the second switches K i1_Hs and K i1_LS of the first measuring circuit 22 B1 are in this example connected in reverse.
  • the first and second switches K i2_HS and K i2_LS of the second measuring circuit 22 B2 are connected in reverse.
  • the measuring circuits 22 B1 ; 22 B2 comprise at least one measuring resistor R mes or R mes ' connected by a first terminal to ground.
  • the first switch K i1_HS ; K i2_HS of a measuring circuit 22 B1 ; 22 B2 has a terminal connected to a second terminal of the measuring resistor R mes or R mes ', the first terminal of the measuring resistor R mes or R mes ' being connected to the mass.
  • the second switch K i1_LS ; K i2_LS of a measuring circuit 22 B1 ; 22 B2 has a terminal connected to ground.
  • the first transistors K i1_Hs and K i2_HS must be such that the voltage between the gate and the source is greater than the threshold voltage of the transistor to activate the transistor.
  • the transistors K i1_Hs and K i1_LS of the first measuring circuit 22 B1 and the transistors K i2_HS and K i2_Ls of the second measuring circuit 22 B2 are controllable according to the control logic of the H-bridge.
  • the primary circuit 12 of a transformer B1 or B2 B2 is closed, the current chopped to the primary circuit 12 of the transformer 10 B1 or B2 B2 is non-zero, and the two transistors K i1_HS and K i1_LS or K i2_HS and K i2_LS of the measuring circuit 22 B1 or 22 B2 associated are in the on state.
  • the chopped current is zero, and the two transistors K i1_HS and K i1_LS or K i2_HS and K i2_LS of the measuring circuit 22 B1 or 22 B2 associated are in the off state.
  • the ground current i Mos1 or i Mos3 to the primary circuit 12 of a transformer 10 B1 or 10 B2 is non-zero, and there is therefore a current to be measured, the two transistors K i1_Hs and K i1_LS or K i2_HS and K i2_LS of the measuring circuit 22 B1 or 22 B2 associated must be controlled in the on state.
  • the demagnetization of a transformer B1 or B1 B2 can be carried out when the primary circuit 12 of the transformer B1 or B2 B2 is open, the minced current i Mos1 or i Mos3 being zero and there is no current to be measured, by blocking the two transistors K i1_Hs and K i1_LS or K i2_HS and K i2_Ls of the measuring circuit 22 B1 or 22 B2 associated, so as to disconnect the demagnetizing circuit 20 B1 or B2 from the measuring resistor Rmes or Rmes' during demagnetization of the corresponding transformer 10 B1 or 10 B2 .
  • a chopped current i Mos1 or i Mos3 flows in the primary circuit 12 of the associated transformer B1 or B2 B2 , and a current is induced in the circuit secondary 14 of the associated transformer 10 B1 or 10 B2 .
  • the transistors K i1_HS and K i1_LS of the first measuring circuit 22 B1 respectively if the transistors K i2_HS and K i2_LS of the second measuring circuit 22 B2 are on, a current i mes1 , respectively i mes2 , flows in the first or second associated measuring circuit 22 B1 or 22 B2 .
  • the two measuring circuits 22 B1 and 22 B2 furthermore comprise a common measuring resistor R mes connected on the one hand by a first terminal to ground and by a second terminal on the source of the first two transistors K i1_HS and K i2_HS .
  • the source of the first transistor K i1_HS of the unit adapted to allow or prevent the circulation of a current induced by the chopped current in the first measuring circuit 22 B1 is therefore connected to the source of the first transistor K i2_HS of the unit adapted to allow or prevent the circulation of a current induced by the chopped current in the second measuring circuit 22 B2 .
  • the currents i mes1 and i mes2 respectively flowing in the first measuring circuit 22 B1 and in the second measuring circuit 22 B2 add up, so that the common measuring resistor R mes is traversed by a current i mes , corresponding to the sum of currents i mes1 and i mes2 .
  • the measurement of the chopped current is done by measuring the voltage v mes across the measuring resistor R mes .
  • this voltage v mes is an image of the chopped current i e , according to formula (1):
  • v my R my m i i e
  • R mes measuring resistance common to the two measuring circuits 22 B1 and 22 B2
  • v mes measured voltage across the measuring resistor R mes
  • m i transformation ratio of a transformer B1 or B2 B2 .
  • the transistors of the associated measurement circuit 22 B1 or 22 B2 in the off state make it possible to decouple the measurement resistor R mes from the demagnetizing circuit 20 B1 or B2 .
  • the measurement of the voltage V mes is not disturbed.
  • the two measuring circuits 22 B1 and 22 B2 each have a separate measuring resistor R mes '.
  • the two measurement resistors R mes ' are of substantially equal value according to the example described.
  • the measuring resistor R mes ' is connected between the two sources of the first transistor K i1_HS , and the second transistor K i1_LS .
  • the source of the second transistor K i1_LS is connected to ground.
  • the measurement resistor R mes2 is connected between the two sources of the first transistor K i2_HS and the second transistor K i2_LS .
  • the source of the second transistor K i2_Ls is connected to ground.
  • the two measurement circuits 22 B1 ; 22 B2 respectively comprise a measuring resistor R mes ' connected by a terminal to ground.
  • the measuring resistor R mes ' of the first measuring circuit 22 B1 is connected by one of its terminals to the source of the first transistor K i1_HS , and by the other of its terminals to the source of the second transistor K i1_LS of the first transistor. measure 22 B1 .
  • the measuring resistor R mes ' of the second measuring circuit 22 B2 is connected to the source of the first transistor K i2_HS by one of its terminals, and by the other of its terminals to the source of the second transistor K i2_LS of the second circuit. measure 22 B2 .
  • the common measuring resistor R mes or each separate measuring resistor R mes ' of the two measuring circuits 22 B1 and 22 B2 is connected to ground. This arrangement makes it possible to obtain better immunity with respect to noise.
  • the first measuring circuit 22 B1 comprises a first output resistor R connected to the source of the first transistor K i1_HS and to the measurement resistor R mes '.
  • the second measuring circuit 22 B2 comprises a second output resistor R connected to the source of the first transistor K i2_HS and to the measurement resistor R mes '.
  • the voltage V mes can be measured at the common node between the two output resistors R.
  • the measurement of the chopped current is done by measuring the voltage v mes at the common node between the two output resistors R.
  • this voltage v mes is an image of the chopped current i e , according to the formula (3):
  • v my 1 2 R my ' m i i e
  • R mes ' measuring resistance of each measuring circuit 22 B1 and 22 B2
  • v mes voltage measured at the common node between the output resistors R
  • m i transformation ratio of a transformer B1 or B2 B2 .
  • these measuring resistors R m are decoupled from the associated demagnetizing circuit B1 or B2 during the demagnetization period of the associated transformer B1 or B2 .
  • each measurement circuit 22 B1 and 22 B2 is substantially equal to the value of the resistance R mes measures common to the two measuring circuits 22 B1 and 22 B2 , it is noted a ratio of 1 ⁇ 2 in the transfer function.
  • the first embodiment with the common measuring resistor R mes to the two measurement circuits 22 B1 and 22 B2 provides measurement accuracy because there are fewer resistors.
  • the scheme of the figure 4 presents details of the measuring circuit 22 B1 or 22 B2 according to the first embodiment illustrated in FIG. figure 2 . Good understood, these complements or precisions also apply to the second embodiment illustrated on the figure 3 .
  • the first measuring circuit 22 B1 also comprises a first resistor R 11 and a second resistor R 21 connected by a common terminal to the gates of the two transistors K i1_Hs and K i1_LS of the measuring circuit 22 B1 , and other to a third switch K i1 .
  • the third switch K i1 of the first measuring circuit 22 B1 is controlled by the control signal K 2 which also controls the second switch Mos 2 of the first branch B 1 .
  • the second measuring circuit 22 B2 also comprises a first resistor R 12 and a second resistor R 22 , connected by a node common to the gates of the two transistors K i2_HS and K i2_Ls of the measuring circuit 22 B2 , and other part to a third switch K i2 .
  • the third switch K i2 of the second measuring circuit 22 B2 is controlled by the control signal K 4 which also controls the second switch Mos 4 of the second branch B 2 .
  • the first resistor R 11 or R 12 is connected to an exemplary potential of 15V and the second resistor R 21 or R 22 is connected to ground.
  • the first and second resistors R 11 and R 21 or R 12 and R 22 make it possible to guarantee the good switching of the first transistor K i1_HS or K i2_HS in the on state. More precisely, when the third switch K i1 or K i2 is off, the voltage V G1 , respectively V G2 , to the gates of the transistors, is positive, for example of the order of 10V.
  • the value 10V makes it possible to obtain the condition according to which the voltage between the source and the gate of a first transistor K i1_Hs or K i2_HS is greater than the threshold voltage of the transistor.
  • the figure 5 represents an example of temporal evolution of the currents i Mos1 or i Mos3 flowing in the primary circuits 12 of the transformers 10 B1 and 10 B2 .
  • the non-limiting example illustrated on the figure 5 has a high duty cycle.
  • the ground current i Mos1 or i Mos3 flowing in the primary circuit 12 of a transformer 10 B1 or 10 B2 is periodic and is able to take zero values and non-zero values.
  • the primary circuit 12 of a transformer 10 B1 or 10 B2 is open, the ground current i Mos1 or i Mos3 flowing in the primary circuit 12 of the transformer 10 B1 or B2 B2 is zero, and the demagnetization of the transformer 10 B1 is carried out or corresponding B2 .
  • the offset between the ground current i Mos1 flowing in the primary circuit 12 of the first transformer 10 B1 and the ground current i Mos3 flowing in the primary circuit 12 of the second transformer 10 B2 depends on the offset between the branches B 1 and B 2 .
  • the first switch Mos 1 of the first branch B 1 is on when the second switch Mos 2 of the first branch B 1 is blocked, and conversely, the first switch Mos 1 is blocked when the second switch Mos 2 is passing. .
  • a dead time t m is expected between two switching.
  • the first transistor K i1_HS and the second transistor K i1_LS of the first measuring circuit 22 B1 are controlled jointly .
  • the first transistor K i1_HS and the second transistor K i1_LS of the first measuring circuit 22 B1 are on when the second switch Mos 2 of the first branch B 1 is blocked.
  • the unit Ki 1_HS , K i1_LS of the first measuring circuit 22 B1 configured to allow or prevent the flow of a current induced by the ground current i Mos1 in the first measuring circuit 22 B1 , is configured to be driven by the inverse of the command signal, named K 2 of the second switch Mos 2 of the first branch B 1 .
  • K 2 the inverse of the control signal of the second switch Mos 2 , called K 2 which controls the state of the transistors K i1_HS and K i1_LS of the first control circuit 22 B1 (cf. figure 6 or 7 ).
  • a demagnetizing current flows in the demagnetizing circuit B1 , the potential difference between the terminals 18 and 16 of the secondary circuit 14 being then imposed by the Zener voltage of the second Zener diode 26 according to the example of figures 2 and 3 .
  • the two transistors K i1_HS and K i1_LS of the first measuring circuit 22 B1 in the off state do not allow the circulation of the demagnetizing current in the measurement circuit 22 B1 .
  • the demagnetizing current decreases while flowing in the demagnetizing circuit B1 .
  • the first switch Mos 3 of the second branch B 2 is on when the second switch Mos 4 of the second branch B 2 is blocked, and conversely, the first switch Mos 3 is blocked when the second switch Mos 4 is passing.
  • a dead time t m is also provided between two commutations.
  • the first transistor K i2_HS and the second transistor K i2_Ls of the second measuring circuit 22 B2 are controlled jointly .
  • the first transistor K i2_HS and the second transistor K i2_Ls of the second measuring circuit 22 B2 are on when the second switch Mos 4 of the second branch B 2 is blocked.
  • the unit K i2_HS , K i2_LS of the second measuring circuit 22 B2 configured to allow or prevent the flow of a current induced by the ground current i Mos3 in the second measuring circuit 22 B2 is configured to be driven by the inverse control signal K 4 the second switch Mos 4 of the second branch B 2 .
  • K 4 This is the inverse of the control signal of the second switch Mos 4 , called K 4 which controls the state of the transistors K i2_HS and K i2_Ls of the second measuring circuit 22 B2 (cf. figure 6 or 7 ).
  • a demagnetizing current flows in the demagnetizing circuit B2 , according to the example illustrated in FIG. figures 2 and 3 , the potential difference between the terminals 18 and 16 of the secondary circuit 14 then being imposed by the Zener voltage of the second Zener diode 26.
  • the minced current i Mos3 is zero, the magnetizing current decreases while circulating in the degaussing circuit B2 .
  • the device 1 allows the demagnetization of the associated transformer 10 B1 or 10 B2 .
  • the direction of the demagnetizing current depends on the average value of the chopped current i Mos1 or i Mos3 , regardless of the average value of the chopped current i Mos1 or i Mos3 , the device 1 allows the demagnetization of the associated transformer. 10 B1 or 10 B2 .
  • this is done by measuring the voltage v mes across the measuring resistor R mes according to the first embodiment illustrated in FIG. figure 2 or 4 or by measuring the voltage v mes at the common node between the output resistors R of the two measuring circuits 22 B1 and 22 B2 according to the second embodiment illustrated in FIG. figure 3 , the voltage v mes being proportional to the chopped current i e , according to formula (1) for the first embodiment or according to formula (3) for the second embodiment.
  • This measurement of the voltage v my e.g. measured across the measuring resistor R my gives an information on the average value of the input current i e absorbed by the converter 3, for example via a double RC filter for obtaining the voltage V IE corresponding to the average value of the voltage V mes .
  • the peak value of the instantaneous current i e may be controlled.
  • two comparators can be provided.
  • the first comparator being for example provided for limiting the current, and the second comparator for fault detection.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
EP15198460.6A 2013-12-16 2014-12-15 Messvorrichtung eines zerhackten stroms Active EP3015870B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1362667A FR3015041B1 (fr) 2013-12-16 2013-12-16 Dispositif de mesure d'un courant hache
EP14307036.5A EP2884288B1 (de) 2013-12-16 2014-12-15 Messvorrichtung zur Messung eines zerhackten Stroms

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EP14307036.5A Division EP2884288B1 (de) 2013-12-16 2014-12-15 Messvorrichtung zur Messung eines zerhackten Stroms
EP14307036.5A Division-Into EP2884288B1 (de) 2013-12-16 2014-12-15 Messvorrichtung zur Messung eines zerhackten Stroms

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EP3015870A1 true EP3015870A1 (de) 2016-05-04
EP3015870B1 EP3015870B1 (de) 2017-07-19

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EP14307036.5A Active EP2884288B1 (de) 2013-12-16 2014-12-15 Messvorrichtung zur Messung eines zerhackten Stroms
EP15198460.6A Active EP3015870B1 (de) 2013-12-16 2014-12-15 Messvorrichtung eines zerhackten stroms

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Publication number Priority date Publication date Assignee Title
FR3047855B1 (fr) * 2016-02-15 2018-03-16 Valeo Siemens Eautomotive France Sas Convertisseur dc/dc isole
FR3070910B1 (fr) * 2017-09-12 2021-05-07 Valeo Systemes De Controle Moteur Chargeur de vehicule comprenant un convertisseur dc/dc
CN112379156B (zh) * 2020-11-18 2022-10-11 国网浙江省电力有限公司营销服务中心 一种快速测量kA级直流电流突变的方法
CN114900027B (zh) * 2022-07-14 2022-11-15 阳光电源股份有限公司 一种变换器及其封波控制方法

Citations (8)

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Publication number Priority date Publication date Assignee Title
GB2143998A (en) * 1983-07-21 1985-02-20 Ferranti Plc Converter with lossless snubbing components
US5068776A (en) * 1990-11-29 1991-11-26 International Business Machines Corporation Switched-mode DC-DC power converter for reducing effects of magnetization current
EP0631145A2 (de) * 1993-06-24 1994-12-28 DEUTRONIC ELEKTRONIK GmbH Verfahren und Vorrichtung zur Strommessung in Brückenschaltungen
US5610508A (en) * 1994-06-16 1997-03-11 Reltec Corporation Circuitry to maintain proper current transformer operation
US5815391A (en) * 1996-03-19 1998-09-29 International Rectifier Corporation Current sensing circuit for pulse width modulated motor drive
WO2003028198A1 (fr) * 2001-09-21 2003-04-03 Valeo Electronique Et Systemes De Liaison Dispositif de mesure d'un courant hache
US20110316524A1 (en) * 2010-06-23 2011-12-29 Hyundai Motor Company Apparatus for diagnosing dc-dc converter and method thereof
US20120127769A1 (en) * 2010-11-16 2012-05-24 Sunedison, Llc Soft Switching Power Converters

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Publication number Priority date Publication date Assignee Title
FR2729471B1 (fr) * 1995-01-13 1997-04-18 Sextant Avionique Convertisseurs de tension bidirectionnels de type continu-continu et capteur de courant
US7521910B2 (en) * 2003-07-08 2009-04-21 Koninklijke Philips Electronics N.V. Method and device for measuring current in a switched current path of a circuit
DE102008031027A1 (de) * 2008-06-30 2009-12-31 Texas Instruments Deutschland Gmbh Automatische Prüfeinrichtung

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2143998A (en) * 1983-07-21 1985-02-20 Ferranti Plc Converter with lossless snubbing components
US5068776A (en) * 1990-11-29 1991-11-26 International Business Machines Corporation Switched-mode DC-DC power converter for reducing effects of magnetization current
EP0631145A2 (de) * 1993-06-24 1994-12-28 DEUTRONIC ELEKTRONIK GmbH Verfahren und Vorrichtung zur Strommessung in Brückenschaltungen
US5610508A (en) * 1994-06-16 1997-03-11 Reltec Corporation Circuitry to maintain proper current transformer operation
US5815391A (en) * 1996-03-19 1998-09-29 International Rectifier Corporation Current sensing circuit for pulse width modulated motor drive
WO2003028198A1 (fr) * 2001-09-21 2003-04-03 Valeo Electronique Et Systemes De Liaison Dispositif de mesure d'un courant hache
US20110316524A1 (en) * 2010-06-23 2011-12-29 Hyundai Motor Company Apparatus for diagnosing dc-dc converter and method thereof
US20120127769A1 (en) * 2010-11-16 2012-05-24 Sunedison, Llc Soft Switching Power Converters

Also Published As

Publication number Publication date
US9645176B2 (en) 2017-05-09
FR3015041B1 (fr) 2017-05-05
FR3015041A1 (fr) 2015-06-19
US20150168461A1 (en) 2015-06-18
CN104714082A (zh) 2015-06-17
EP2884288A1 (de) 2015-06-17
CN104714082B (zh) 2019-01-08
EP2884288B1 (de) 2016-09-21
EP3015870B1 (de) 2017-07-19

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